The energy of a vibrating molecule is quantized much like theenergy of an electron in the hydrogen atom. The energy levels of avibrating molecule are given by the equation
E_n = (n + 1/2)hv
where n is a quantum number with possible values of 1, 2,...and vis the frequency of vibration. The vibration frequency of HCl isapproximately 8.85*10^13 s^- 1.
What minimum energy is required to excite a vibration in HCl?